Think what you will about Paul Finebaum, but the man is certainly not afraid of getting under other people’s skin.

His latest irritant — and not for the first time — is Michigan head coach Jim Harbaugh, no stranger to controversy himself. On Thursday night, Harbaugh took to Twitter to call out Finebaum by name, calling him an ‘SEC water carrier’:

Pete Finebaum, the unabashed SEC water carrier, really needs to get his facts straight. #AlternativeFacts

It’s not totally clear what prompted this response, but Finebaum did have author John U. Bacon on his show today to discuss Michigan’s hiring of a top recruit’s father. Bacon said the following during that interview:

But whether it was that what bothered the Michigan head coach, or whether it was something else, the Finebaum-Harbaugh rivalry has taken yet another turn and it shows no signs of slowing down in the near future.

Update: The SEC Network’s Twitter account has responded to Harbaugh on Finebaum’s behalf: